JPH11177972A - Flat display and video interphone system using the display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the externally thin and narrow designs for a flat display device and a video interphone system using the display device. SOLUTION: A flat display module consists of a flat cathode-ray tube CT, a deflecting yoke DY and a display drive circuit board DC. In such a constitution, the DC is placed so as to partly hold the DY and accordingly a flat display is obtained under the DC with a space of several millimeters to several tens of millimeters secured. As a result, an externally thin and narrow design is attained for a flat display device. In addition, the master unit of a video interphone system using the flat display can also have an externally thin and narrow design.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat display using a flat cathode ray tube and a television intercom system using the flat display. The flat display and the television intercom system using the flat display according to the present invention are provided with a space below the driving circuit board of the flat cathode ray tube to accommodate various components used for the display to improve the space factor. It is intended.

[0002]

2. Description of the Related Art As shown in FIG. 4, a flat display module generally used in the past is provided with a deflection yoke DY on a frame FL formed of plastic or metal, which is a casing of the flat display module, in a rectangular shape.
In many cases, a flat-type cathode ray tube CT equipped with a display and a display drive circuit board DC in which a drive circuit and a video signal processing circuit are integrated are arranged. The flat display module having such a configuration has a function of supplying an external power supply and receiving a video signal and displaying a video, and is most often applied to a television intercom system.

FIG. 5 shows the overall configuration of a television intercom system. The TV intercom system includes a master unit MS and a slave unit CS. Master unit MS uses a flat display module as monitor television unit MO, and is configured by arranging a handset as input / output of communication unit CM. This parent machine MS is installed indoors. Slave unit C
S has a television camera CA and an intercom IH and is generally installed at the entrance of a house or the like. The master unit MS and the slave unit CS are connected by a communication line LN, and a conversation can be performed while checking the image of a person outside or at the entrance. The slave unit is an intercom device with a television camera, and the master unit is a device for monitoring the voice and image of the visitor acquired by the slave unit.

[0004] The slave unit CS is held in a rectangular housing, and an intercom unit I is provided by a speaker and a microphone arranged on the front side.
Through H, it is possible to communicate with the master unit MS.
In the slave unit CS, a camera section CA is arranged above the intercom section IH, and the camera section CA can capture an image of an outdoor scenery and a visitor to acquire an image thereof. The video signal obtained by the camera unit CA and the audio signal obtained by the intercom unit are generated directly or as a frequency modulation signal, frequency-multiplexed, and transmitted to the master unit MS via the communication line LN. On the other hand, in the master unit MS, the communication unit CM is configured by a handset or the like arranged on the side, and the slave unit C
The audio signal directly or frequency-modulated as in S
Transmit to S. The transmission of these mutual audio signals enables a conversation between a visitor on the master unit MS side and a visitor on the slave unit CS side.
The master unit MS has a monitor television unit MO on the front side, receives a video signal from the slave unit CS, and receives the monitor television unit MO.
It is made possible to have a conversation by watching the image of the visitor displayed on O.

[0005]

As described above, the display device on which the flat display module is mounted includes not only the display drive circuit board of the flat display module but also signal processing circuits for video / audio / control. Must be configured on a separate substrate. It is necessary to arrange these additional substrates with a certain distance below the flat display module, and to avoid mounting a tall component at a position where it does not hit the flat display module. Conventionally, many proposals have been made on a method of arranging substrates of a flat display module.

For example, Japanese Patent Application Laid-Open No. 63-135076 discloses a method of arranging a substrate on which electronic components are mounted on a flat back surface of a flat cathode ray tube facing a phosphor screen. Further, a method has been proposed in which an additional substrate is set up at a right angle on the side of the flat display module to have a structure in which the spread of the entire substrate is suppressed. However, as a result, there are many cases where the appearance of the display device is thick or has a wide design. Current,
These problems are also encountered in the appearance design of the main unit of the television intercom system, which is most often applied to a flat display module.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a flat display module comprising a flat cathode ray tube, a deflection yoke and a display drive circuit board, wherein the display drive circuit board is arranged with a part of the deflection yoke sandwiched therebetween. By doing so, a flat display having a space of several mm to several tens mm at the bottom of the display drive circuit board is realized, thereby enabling the device to have a thin appearance and a narrow design. As a result, the appearance design of the base unit of the television intercom system using the flat display of the present invention can be made thinner and narrower.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view showing the configuration of a flat display according to the present invention and a flat display module used in a television intercom system using the flat display. FIG. 1A shows a front view thereof, and FIG. 1B shows a side view thereof.
In FIGS. 1A and 1B, FL is a flat display frame, DY is a deflection yoke, and CT is a flat cathode ray tube. The flat display module is composed of a flat cathode ray tube having a frame serving as a housing, a deflection yoke, and a display driving circuit board.

The frame FL is formed of plastic or metal into a rectangular shape, and serves as a housing of a flat display module. In the frame FL, a flat cathode ray tube CT having a deflection yoke DY mounted thereon, that is, a display driving circuit board DC in which a video device, a circuit for driving the video device, and a video signal processing circuit are integrated is arranged. ing. The flat display module having such a configuration has a function of receiving an external power supply and receiving a video signal and displaying a video.

As shown in FIG. 1A, the display drive circuit board DC has a trapezoidal shape in which a portion corresponding to a flat cathode ray tube and a deflection yoke is cut out to secure a space below. Have. For this purpose, the flat display module of the present invention is arranged such that the display driving circuit board DC is disposed with a part of the deflection yoke sandwiched therebetween, so that the mounting position of the display driving circuit board DC is as shown in FIG.
As shown in (b), the frame can be installed so as to float from the bottom of the frame by several mm to several tens of mm, and it is possible to secure the space SP below the display drive circuit board.

FIG. 2 shows an embodiment of a flat display according to the present invention and a display apparatus to which a flat display module used in a television intercom system using the flat display is applied. In FIG. 2, the outer frame is a casing of the display device, in which a display device additional circuit board DCA is disposed on the bottom surface, and the flat display module DC is disposed thereon. FIG.
In the embodiment, the space a surrounded by the dotted line shows an example in which the lower space of the display drive circuit board of the flat display module is utilized.

FIG. 3 is an enlarged view of the space a in FIG. 2, in which components are arranged on an additional circuit board of a display device corresponding to a lower space at the tip of a flat cathode ray tube. In FIG. 3, the display drive circuit board DC of the flat display module is disposed at a sufficient distance from the lower portion of the frame FL, and the insulating sheet IS is disposed immediately below the display drive circuit substrate DC. The space below the insulating sheet IS is, for example, 3 mm or more. Underneath is an additional circuit board DCA of the display device. In the past, there was no space below the flat display module, and it was not possible to mount components on an additional circuit board of the display device at this portion.

On the other hand, in the flat display module of the present invention, a sufficient space is secured as shown by a space a surrounded by a dotted line, so that many mounts can be mounted on short components. Further, since the insulating sheet IS is arranged, there is no fear of short-circuiting with the component on the flat display module side. Conventionally, many components mounted so as to avoid the flat display module can be efficiently arranged. As a result, it becomes possible to design a space-saving display device that could not be obtained conventionally. It is possible to provide a compact display device and a compact display system with an appearance design different from the conventional one. This is an optimal and important technology especially for a TV intercom system that pursues space saving and thinness.

[0014]

As is apparent from the above description, the flat display of the present invention and the television intercom system using the same are provided in a flat display module which can be constituted by a flat cathode ray tube, a deflection yoke and a display drive circuit board. By arranging the display drive circuit board so as to sandwich a part of the deflection yoke, by realizing a flat display having a space of several mm to several tens of mm below the display drive circuit board,
The appearance of the device is thin, enabling a narrow design.

As a result, the appearance design of the base unit of the television intercom system using the flat display of the present invention can be realized with a thin appearance and a narrow design. By utilizing the flat display of the present invention, it is possible to design a space-saving display device and a display system that could not be obtained conventionally. That is, it is possible to provide a display device and a display system that are different in appearance design and compact from the conventional one at low cost. Particularly, in a television intercom system pursuing space saving and thinness, the effect can be exhibited most.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of a flat display module of the present invention.

FIG. 2 illustrates an embodiment of a display device to which the flat display module of the present invention is applied.

FIG. 3 is an enlarged view of a space a in FIG. 2;

FIG. 4 shows a flat display module generally used in the related art.

FIG. 5 shows an overall configuration of a television intercom system.

[Explanation of symbols]

FL: Flat display frame, DY
... Deflection yoke, CT ... Flat type cathode ray tube,
DC: Display drive circuit board, DCA: Additional circuit board, MS: Master unit, CS:
Slave unit, MO: Monitor television section, CM:
Communication unit, IH: Interphone, CA: Television camera, LN: Communication line

Claims (6)

[Claims] In a flat display module comprising a flat cathode ray tube, a deflection yoke, and a display drive circuit board, the display drive circuit board is arranged so as to sandwich a part of the deflection yoke. Flat display with space provided on the bottom of the lower frame. 2. A flat display module comprising a flat cathode ray tube, a deflection yoke, and a display drive circuit board, wherein the display drive circuit board is provided with a cutout for receiving a part of the deflection yoke, and the display drive circuit board is deflected. A flat display in which a space is provided on the bottom surface of the frame below the cathode ray tube by arranging the yoke so as to sandwich a part of the yoke. 3. A flat display module comprising a flat cathode ray tube, a deflection yoke, and a display driving circuit board, wherein the display driving circuit board is provided with a trapezoidal cutout for receiving a part of the deflection yoke. A flat display in which a substrate is arranged with a part of a deflection yoke sandwiched therebetween to provide a space on the bottom surface of a frame below a cathode ray tube. 4. A telephone set having an intercom function and a TV camera installed outdoors or at the entrance, receiving voice information and image information transmitted from the child apparatus, and talking while watching the image of the other party on the side of the child apparatus. In a TV intercom system including a master unit installed in a room capable of, a display drive circuit board is arranged on a monitor television unit of the master unit with a part of a deflection yoke sandwiched therebetween, thereby forming a lower part of a cathode ray tube. A television intercom system in which a flat display having a space provided on a bottom surface of a frame is used, and components are arranged in a space below a display driving circuit of the flat display. 5. A telephone set having an intercom function and a TV camera installed outdoors or at the entrance, receiving voice information and image information transmitted from the child apparatus, and talking while watching the image of a conversation partner on the child side. In a television intercom system comprising a master unit installed in a room capable of being provided, a notch portion in which a part of a deflection yoke is inserted into a display driving circuit board is provided in a monitor television section of the master unit, and the display driving circuit board is By using a flat display with a space provided on the bottom surface of the frame below the cathode ray tube, a part is placed in the lower space of the display drive circuit possessed by the flat display. TV intercom system consisting of a telephone. 6. A slave unit having an intercom function and a television camera installed outdoors or at the entrance, receiving voice information and image information transmitted from the slave unit, and talking while watching the image of a conversation partner on the slave unit side. In a television intercom system including a master unit installed in a room capable of performing, a trapezoidal cutout portion in which a part of a deflection yoke is inserted into a display drive circuit board is provided in a monitor TV unit of the master unit, and a display drive circuit board is provided. Is arranged with a part of the deflection yoke sandwiched therebetween, so that a flat display is used with a space provided on the bottom surface of the frame below the cathode ray tube, and the lower part of the display drive circuit held by the flat display is used. A TV intercom system consisting of components arranged in a space.